Nftables' "ct count" hangs my terminal

Hello
I want to add this Nftables rule to my input chain:
nft add rule ip filter input ct count over 2 reject with tcp reset
But when I write this command in bash, it doesn’t return: it hangs.
This only happens when I write the “ct count …” option.
What’s going on?
My kernel is 5.5.9-200.fc31.x86_64 in nftables package version is last available in official repository: 0.9.1
Thanks!!

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